1 1/4 cup sugar
1 stick (8 tablespoons) unsalted butter, softened
1/2 cup vegetable shortening
2 large eggs
2 1/3 cups flour
2 teaspoons cream of tartar
1 teaspoon baking soda
1/2 teaspoon salt
1 tablespoon cinnamon
1/4 cup sugar
Adjust oven rack to the middle position and heat oven to 375 degrees.
Beat shortening and sugar in large mixing bowl. Add softened butter and beat just enough to mix. (over beating will soften the butter too much and makes the cookies flat) Beat in eggs, one at a time.
Combine the dry ingredients in a separate bowl and slowly add into the sugar mixture until combined.
Roll dough into balls. then roll in the cinnamon and sugar mixture to coat. Place on cookie sheet about 2 inches apart. Bake 10-12 minutes ( until the edges are set and just beginning to brown but the centers are still soft and puffy)
Let cookies cool on the baking sheet for 10 minutes, then transfer to a wire rack and let cool.